(19)

(11)

EP 1 521 561 A2

(12)

(88) Date of publication A3: 18.03.2004 (43) Date of publication: 13.04.2005 Bulletin 2005/15 (21) Application number: 03742362.1 (22) Date of filing: 01.07.2003

(51) International Patent Classification (IPC)7: A61F 9/00 (86) International application number: PCT/US2003/020720 (87) International publication number: WO 2004/006815 (22.01.2004 Gazette 2004/04)

(84) Designated Contracting States: AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PT RO SE SI SK TR Designated Extension States: AL LT LV MK (30) Priority: 15.07.2002 GB 0216284 (71) Applicant: 3M Innovative Properties Company St. Paul, MN 55133-3427 (US)	(72) Inventors: Wilson, Audra A., Saint Paul, MN 55133-3427 (US) HENDERSON, Christopher P., Saint Paul, MN 55133-3427 (US) CURRAN, Desmond T., Saint Paul, MN 55133-3427 (US) CORMACK, Brian Saint Paul, MN 55133-3427 (US) (74) Representative: Hill, Cecilia Ann  3M Europe,Hermeslaan 7 1831 Diegem 1831 Diegem (BE)